Abstract

The strain effect on critical magnetic field in isotropic high-κ superconductors is studied theoretically in this paper. Based on the phenomenological theory, we obtain the critical magnetic field in the presence of the applied strain. The dependence of upper critical magnetic field on the coupling parameters is discussed. The theoretical analysis is in broad agreement with experimental results as the coupling parameters are the linear functions of the strain. Furthermore, according to the assumption, the plot of strain effect on lower critical field is observed as symmetric curve for compressive and tensile strains. The plots also predict that the strain effect on lower critical field is greater in higher-κ superconductors.

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